People in the UK may be able to catch sight of a historic space mission tonight, it's been revealed.
It comes after stargazers witnessed Starlink satellites - designed to provide low-cost broadband in space - up in the sky earlier this month.
The latest sight will however be the Demo-2 mission which is set to make history when it launches later today (May 27) in the US.
The flight, being operated by a private company in collaboration with NASA, will journey to the International Space Station and could make way for exciting opportunities for the aerospace industry.
So why is the mission so important? And when can stargazers in the UK witness it flying past? Here's everything you need to know.
What is the mission?
The Demo-2 mission is part of NASA's Commercial Crew Program which aims to provide safe and cost-effective transportation to the International Space Station - to increase the opportunity for research.
The flight is being operated by Space X - a space company run by billionaire Elon Musk - and is the firm's final test flight of the Commercial Crew Program.
As explained by EarthSky, the mission will contribute towards NASA "certifying SpaceX’s crew transportation system for regular flights carrying astronauts to and from the space station."
The Demo-2 mission will be carrying NASA astronauts Robert Behnken, 48, and Douglas Hurley, 53, who will be operating the Crew Dragon spacecraft.
The experienced pair will be launched into space later today on the Falcon 9 rocket, with data from all aspects of the mission to be reported by SpaceX as part of the test flight - with the company reportedly gearing up for future mission.
Why is the mission important?
The flight marks the first time since 2011 that astronauts have been launched to the International Space station from US soil.
The Demo-2 mission is also a historic moment for the aerospace industry and perhaps suggests the future of space travel.
This is because it's the first time a commercially built and operated US spacecraft will carry astronauts to the space station.
How can you see the flight?
The Falcon 9 rocket will take off from launchpad 39A at the Kennedy Space Centre in Florida later today en route to the International Space Centre.
As reported by the Manchester Evening News, it will lift-off at around 4.33pm EDT - which is around 9.33pm in the UK.
That means that, if all goes to plan, we could see the rocket flying over the UK about 15 minutes later between 9.45-9.50pm.
According to MeteorWatch, the spacecraft will pass over the UK from a westerly direction and head east - where it may be visible in the southern part of the sky for a few minutes.
The website suggests we may see "just the one or a collection of objects looking like bright stars moving across the sky."
The spacecraft "should be bright enough to follow" once you have caught a glimpse of it later tonight.
The launch and subsequent broadcasts of this mission will be aired live on NASA Television and through the agency's website.
